landfill type aerobic landfill anaerobic sanitary landfill with daily cover improve anaerobic...

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Page 1: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection
Page 2: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Landfill Type

aerobic landfill anaerobic sanitary landfill with daily

cover improve anaerobic sanitary landfill with

buried leachate collection facilities landfill with forced aeration

Page 3: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Only the anaerobic and semi-aerobic landfill are desirable when leachate and gas quality to be considered

Page 4: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection
Page 5: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Open dumping

potential source of disease fires are uncontrolled air pollution smell pollute nearby waterways & ground

water ugly scavenging

Page 6: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Sanitary landfill

destruction of habitats - (wetland) cause of urban land shortage hence transportation cost – (distant) lost of resources – cannot be replace leachate leakage - (groundwater

contamination) maintenance after completion require 10

to 15 years Non-available of suitable cover material

Page 7: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Level of Sanitary Landfill

Level 1: control tipping

Level 2: sanitary landfill with bound and daily soil cover

Level 3: sanitary landfill with leachate recirculation

Level 4: sanitary landfill with leachate treatment facilities.

Page 8: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Landfill Technology

The most common landfill technologies are

area method

trench method

ramp method

sandwich method

Page 9: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Area method/Depression

terrain is unsuitable for the excavation of trenches

Solid waste cells constructed in a large area

layers of cells are created until the permitted height reached

Each cell represents the waste received and compacted in place and covered each day.

Page 10: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Can accommodate very large volume operation

Earth dyke with height of one lift (2-3 m) is first constructed to gate the support for compacting.

The wastes are unloaded at the top of the earth dyke and spread and compacted on the slope of the dyke.

The layers dept is from 30 – 60 cm.

Page 11: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Depression method best for area where natural depression exist.

The installation liners and leachate collection system is relative easy.

The earth cover of this system is usually obtain from borrow-pit or brought from elsewhere.

Page 12: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

• Area method

Page 13: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Trench Method

Waste is spread and compacted in an excavated trench

The excavator tailings are used as cover material

Best for flat land where the excavation of trenches can be carryout easily.

The ground water level should be sufficiently low

Page 14: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

The trench size varies in length and width:

dept: 1 – 2 metre width: 2 – 5 metre length: 30 – 120 metre

Wastes are spread into thin layers from 30 -60 cm and compacted before soil cover in introduced.

Page 15: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

• Trench Method

Page 16: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Ramp method

also call progressive slope. A combination of area method and

trench method Solid waste is spread and compacted

on a slope cover material is obtained directly from

the front of the working face. The excavation of cover material

provides a depression for the next day waste.

Page 17: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Ramp is about 15 metre wide and 30 metre length and suitable height.

Trucks come on the top of the ramp and discharge their contents inside the trench.

Page 18: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

Sandwich method

Used when the solid waste is deposited horizontally into narrow valleys.

Cover soil layer is added over each layer of solid waste

Page 19: Landfill Type  aerobic landfill  anaerobic sanitary landfill with daily cover  improve anaerobic sanitary landfill with buried leachate collection

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